User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

7.6.2 Testing and Fault Diagnosis

Note: Refer to Section 5 “Troubleshooting the EX7100” before reading this Section.

The module contains semi-conductor components that are

sensitive to electrostatic damage.

Electrostatic sensitive devices should only be stored and

transported inside electrically conductive static shielding

bags. Fault finding and module replacement must be

performed at “electrostatically safe work stations” where the

work bench surface, soldering iron and the operator are all

earthed to prevent the build up of harmful electrostatic

charges.

The RF Power Amplifier module must not be run without a

50Ω load on its output. Failure to meet this condition may

damage the amplifier.

The RF devices used in the Power Amplifier module may

contain beryllium dioxide. These devices must not be broken,

ground, hammered or tampered with in any way, and should

be disposed of in a safe manner as specified in local

environmental and safety legislation. If safe disposal is a

problem, they should be sealed in an appropriate container

and returned to Exicom for disposal. In this case, it is the

senders’ responsibility to ensure that all precautions are

taken to ensure safe delivery to Exicom.

UHF RF Power Amplifier Module Testing

Module DC Input Power Measurement

1. Remove the bottom cover of the terminal as described in Section 6.1.

2. Measure the power supply to the RF Power Amplifier module on the Tx PCB with a

multimeter (by directly accessing the pins within PL103). Refer to Table 3.3 below for

expected voltages on PL104.

Pin Number on PL103 Expected Voltage

1 Ground

2 +14 to 16 V

3 +14 to 16 V

4 +22.8 to 25.4 V

Table 7.3: Power Amplifier Module DC Input Voltages